Plumber&#39;s hand torch



March 15, 1932.

H. F. PAGEL' PLUMBERS HAND TORCH Filed May 27', 1929 f 721162221227.Jfr0%&

Patented Mar. 15,1932

U T -DST or sYcAMoi-en Int-drivers; A cementum or ramers wmmie Haiti)TORCH Application filed May 27, 19 29, s'eri a1 1\ro aeaezo. I v

This invention relates to improvements. in"

plumbersihand blow torches and has special reference to improved. meansfor preliminarily heating the burner of thetorch for starting the sameinto operation.

Heretofore, the u'sual method has been'to provide a. drip pan below theburner, into which a small quantity of the liquid fuel is run, which isthen ignited and heats the burner. Such practice is fraught with manypos sibilities of my present invention, 1 am enabled to eliminate thesedangerous possibilities while," at the same time providlngvery efficientand simple means for starting the burner.

Such torches'consist of a'rese'rvoir for containing the liquid fuel. aburner mounted upon the reservoir, and an air pump for placing the fuelunder'pressure for forcing. it up to the burner. I f The reservoir isnot full of the fuel theup per part being left free of fuel fo'rcontaining theair for producing the pressure. As thisv air is in contactwith the volatile fuel,,it is care buretted air and in conditionto burn.While this carburetted as; could be used alone for preliminarily heatingtheburner, I usually prefer, fo'r'reasons to be explained, to usethisair in combination with aproportionof the liquid fuel to supply a richergaseous mixture for heating the burner, providing asnnple auxiliaryburner beneath the main hurnerin which this mixture is'burned in thestarting process. Y e The inventionwill be-readily understoodbyreference to the accompanying drawings forming part of this.specification and in which:

F 1 is a side elevation of a plumbers 9 hand torch embodying theinvention one form; p I

Fig. 2 is a fragmentary vertical'section through the main andauxi'liaryburners Fig. 3 is a horizontal section on the line 3-3 of Fig. 2;

' Fig. 4 is a fragmentary detail vertical sec tion on the line H of Fig.2; 1 Fig. 's a fragmentaryverticalsection of the lower end of theauxiliary burner feed gopipe; and A of accident 'ordanger. Bymeans fuelunder pressure; Usually the torch is its forward end'forreceivi-ngthe'upperend Fig. 6 isa section simila'rto Fig; 2' and skewing aslightly modified form of the: in vention; In said d'rawi'ngs, 1"illustrates the reservoirof the torch." A self-generatingburner 2mounted above the reservoir, aconnecting ipe 3 being screwed into thetop of the reser -f v'oir', Sand the burner 2 is screwed ontothe pipe.A; hand pump'tis provided; carried by the reservoir for placing thecontained.

provided with a handle 5-for manipulating same, the torch being portablein form. Theburner 2 c'onsists mainly of a cyl-indrical'shell 6 open atits forward end and closed at its rear end by an endwal'l '7 I throughwhich projected centrally arranged tube 8. An outlet opening 9" for thefuel is centrally arranged beyond the outer end of the tube 8, and. aneedleivalve 10- is provided for controlling said outlet.

The burner is" provided with a screw threaded opening 11 in its lowerside near of theconne'cting pipe 3', and a fuel feedpassage" 12 leadsfrom" the bottom of this open ingithrough the bottom wall of the burnertothe needle: v'alve -10..- A smallfeedl tube 13'is'scrfewed"tightlyinto thel'ower end of the passage 12"a'.nd extendsdown through= the pipe 3 and ends near thebott om of the: reservoirwicking' '14: being carried by the tube 131so that. even though the fueldoes not rise to the lower end of thetube, the fuel will be fed tosame.[ A second tube extends down through the pipe 3 and ends close tothe bottom of the reservoir. This second tube is screwed into the lowerend of a sec ond feed passagelfi which extends through thewall of theburner-beneath the passage 12. Q Beneath the main burner 2 is arrangedanauxiliary or starting burner 17 which' extends horizontally belowthepassages 16 and 12.

- The passage 16 leads to'a valve chamber 18 which feeds thefu'elto asmall exit opening 1f9arranged centrallyin line with theau'x -i i-l'iaryburner 17. This exit openin=gr19 is controlled a hand operable needlevalve 202;! The opposite end ofthe passage'16' en m ters the pipeopening 11, and the small feed tube 15 is connected with same. Means areprovided for causing a rich mixture of air and fuel or rathercarburetted air and fuel to flow through the passage 16 to the auxiliaryburner 17. whenever the valve 20 is opened. This means consists inproviding a very small needledike feed opening 21 leading into thebottom of the feed tube 15 through a plug or cap 22 which closesthelower end of the tube. The outer end of the feed opening 21 is protectedby a very fine wire mesh guard 23 held over the cap 22 by a clampingring 2 1.

Just above the lower end of the feed tube 15, abranch feed pipe 25 isconnected which leads up to the top of the reservoir above,

what might be termed the normal liquid level indicated at 26, Fig. 1.The upper end 25' of the. feed tube 25 is open, and the carburetted airin the upper part of the reservoir is free to enter same. Also, theliquid in the reservoir can enter the lower end of the feed tube 15through the feed opening 21, which is adapted to project a very fineneedlelike stream of the liquid fuel centrally up through the feed tube15 when the valve 20 is opened to feed fuel to the auxiliary burner.When this occurs, the carburetted air enters the lower end of the feedtube 15 through the feed pipe 26 and mixes with the stream of fuelentering through the opening 21, thoroughly mixing with same, thusenriching the carburetted air, which then passes on through the feedpassage 16 to the outlet 19.

The auxiliary burner 17 which I have provided is very efficient. It iscylindrical in form and is mounted at one end on a threaded projection27 at the base of the main burner just above the connection with thepipe 3.

This aux'liary burner consists of a central tubular member 28 ending atone end in a head 29, the tube being internally threaded at this end formounting on the" projection 27. The opposite end of the tube is open,and the feed opening 19 is adapted to project the fuel centrally intothe open end of the tube. Surrounding the tube 28 and mounted on thehead 29 at one end and on a removable head 29 at the opposite end is acylindrical shell 30. The upper side of this shell 30 is opened up andis formed to provide upwardly projecting side guide walls 31.

A second cylindrical shell 32 is arranged within the first shell 30 andcloses the opening produced when the shell'30 is opened up to form thewalls 31. This second shell is provided with a plurality of narrowburner slots or openings 33 extending across same and adapted to projectflames against the lower part of the main burner containing the feedpassages 12 and 16. The inner tube 28 is closed except for a series offeed openings 28 and 28 extending along the lower side thereof. Theopenings 28*, which are nearer to the open end of the tube 28, areslightly larger than the openings 28 at the other end. This is for thepurpose of eflecting an even distribution of the fuel the whole lengthof the auxiliary burner.

The exit end of the feed opening 19 is spaced from the entrance end ofthe auxiliary burner, and this end of the burner is flared, as shown at35.. of air to the fuel. As the mixture of air and fuel passes throughthe auxiliary burner, it is thoroughly mixed by being forced to passdownwardly through the openings 2828 then. around the tube 28 and outthrough the narrow burner slots 33. By these frequent changes ofdirection of flow and the consequent baffling of direct flow, any fluidparticles of the fuel are broken up at least into very small orinfinitesimal drops, the air and fuel is thoroughly mixed, and thecarburetted air issues from the slots 33 in condition to burn with highefliciency. The flames from the slots 33 are'impinged directly againstthe part of the burner frame containing the feed passage 16 to theauxiliary burner, and the almost instantaneous effect is to thoroughlygasify or dry the fuel flowing to the auxiliary burner. The next eflectis to raise the temperature of the liquid fuel in the feed passage 12,which leads to'the main burner, to the point where the fuel issues fromthe fuel feed opening 9 in gaseous form.

This is then ignited, and within a very short time the burner is heatedfrom the flame produced by the fuel which escapes through the main feedopening 9 to the point where it will properly gasify the fuel flowing tothe main burner. When this occurs, the auxiliary burner can be shut off.

In starting the burner by the use of the auxiliary burner, and while theauxiliary burner is cold, the carburetted fuel entering theauxiliarybu'rner through the controlled outlet 19, condenses within theauxiliary burner and liquid fuel accumulates in same. This accumulationof liquid fuel gradually vaporizes and passes oi as the auxiliary burnerbecomes heated.

In Fig. 6, I have shown a form of the invention which, while not quiteas efficient as the form already described, is effective for the purposeintended.

' In this modified form, the carburetted air from the top of thereservoir is used directly. The main burner, as in the form described,is mounted on a tube 36 which in turn is mounted in the top of thereservoir. A central fuel feed tube 37 extends down through the supporttube 36 to a point close to the bottom of the reservoir. The feed tube37 is smaller in external diameter than the internal diameter of thesupport tube, providing an annular space 38 between them. 1 This space38 communicates at its lower end with the top of the reservoir and atits upper end with a This assists in the addition.

passage is controlled by a valve 42, and the burner tube 41 has aseriesof small holes 48 in its upper side through which the carburetted aircan escape and cause flames tov be projected against the main burner togasify the fuelin the feed passage 12. This form 1s a very simple meansof making use of the the reservoir,

carburetted air in theupper part of the'reservoir for starting the mainburner into operation.

As many modifications of the inventionwill readily suggest themselves toone skilled in the art, I do not limit or confine the invention to thespecific details of construct-ion herein described.

I claim:

1. An auxiliary burner for use in heating the main burner of a plumberstorch, said auxiliary burner consisting of an inner tube open at one endto receive the fuel, the tube provided with a row of graduated fuel feedopenings along its lower side, a shell surrounding said tube andprovided with burner openings along its upper side, and guide walls onthe auxiliary burner, extending up above the burner openings as and forthe purpose specified.

2. In a device of the kind described, a

; liquid fuel tank, means forplacing the fuel under pressure, a burnermounted on the tank, means connecting the burner with the tank below thenormal liquid level-therein, including a fuel passage in the lower wallof the burner, an open container for liquid fuel below said passage, andmeans for directing liquid fuel from said tank into said open container,and a valve for controlling the flowof fuel into said open container.

- 3. In a device of the kind described, a liquid fuel tank, means formaintaining the fuel under pressure, a burner fuel feed means connectingthe burner with the tank, an open topped liquid fuel container below theburner, a valve for controlling the flow of fuel to said burner, meansfor feeding liquid fuel burner into operation,

liquid and gaseous fuel from the reservoir i to the auxiliary burnerincluding a second fuel passage in the lower wall ofthe main,

burner, a fuel jet producing orifice being provided for discharging fuelfrom said second passage into the auxiliary'burner. 5. In a device ofthe kind described having thefuel thereinunder pressure, a main burnermounted 011 the reservoir, aifuel feed passage for the burner extendingthrough the lower wall of the main burner, an auxiliary ing'a liquidfuel reservoir, means for placburner beneath the main burner: adapted toheat the fuel in said fuel feed passageffor starting the main burnerinto operation, a

, second fuel feed passage in the lower wall of the mainburner, meansfor discharging fuel from said second passage to the auxiliary burner, afuel feed lower part of the reservoir to said second feed passage, and abranch passage leading from a point adjacent to the lowerend of saidfuel feed conduit to the upper part of the reservoir.

In a device. of the kind described having a liquid fuelreservoir, meansfor placing the fuel therein under'pressure, a main burner mounted onthe reservoir, a fuel feed passage for, the main burner extendingthrough the lower wall of the burner, an auxiliary burner beneath themain burner adapted to heat the fuel in said fuel feed passage forstarting the a second feed passage in the lower wall of the main burner,means for discharging fuel from said second feed passage in jet forminto the auxiliary burner, and means for feeding a mixture of gaseousfuel from the upper part of the reservoir and liquid fuel from the lowerpart of the reserof January, 1929. V V

' HERBERT F. PAGEL.

from the tank to said open topped liquid 7 fuel container for use inheating the burner v for starting same into operation, and a sec- 0ndvalve for controlling the quantity of fuel fed to said open toppedcontainer.

4:. In a device of the kind described having a liquid fuel reservoir,means for maintainmg an inflammable gas in the upper part of reservoir,means for feeding liquid fuel from burner, an auxiliary burner arranged.below said passage, means for feedlng combined a main burner mounted onthe.

conduit leading from the vinvention, I aflix my signature this lth day

